Update FirebaseListAdapter to use Context in constructor and layout inflation (#774)

Author: WillieCubed

database/src/main/java/com/firebase/ui/database/FirebaseListAdapter.java

@@ -1,8 +1,10 @@
 package com.firebase.ui.database;
 
 import android.app.Activity;
+import android.content.Context;
 import android.support.annotation.LayoutRes;
 import android.util.Log;
+import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.BaseAdapter;
@@ -27,21 +29,21 @@
 public abstract class FirebaseListAdapter<T> extends BaseAdapter implements FirebaseAdapter<T> {
     private static final String TAG = "FirebaseListAdapter";
 
-    protected final Activity mActivity;
+    protected final Context mContext;
     protected final ObservableSnapshotArray<T> mSnapshots;
     protected final int mLayout;
 
     /**
-     * @param activity    The {@link Activity} containing the {@link ListView}
-     * @param modelLayout This is the layout used to represent a single list item. You will be
-     *                    responsible for populating an instance of the corresponding view with the
-     *                    data from an instance of modelClass.
+     * @param context    The {@link Activity} containing the {@link ListView}
      * @param snapshots   The data used to populate the adapter
+     * @param modelLayout This is the layout used to represent a single list item. You will be
+ *                    responsible for populating an instance of the corresponding view with the
+ *                    data from an instance of modelClass.
      */
-    public FirebaseListAdapter(Activity activity,
+    public FirebaseListAdapter(Context context,
                                ObservableSnapshotArray<T> snapshots,
                                @LayoutRes int modelLayout) {
-        mActivity = activity;
+        mContext = context;
         mSnapshots = snapshots;
         mLayout = modelLayout;
 
@@ -54,23 +56,23 @@ public FirebaseListAdapter(Activity activity,
      * @param query  The Firebase location to watch for data changes. Can also be a slice of a
      *               location, using some combination of {@code limit()}, {@code startAt()}, and
      *               {@code endAt()}. <b>Note, this can also be a {@link DatabaseReference}.</b>
-     * @see #FirebaseListAdapter(Activity, ObservableSnapshotArray, int)
+     * @see #FirebaseListAdapter(Context, ObservableSnapshotArray, int)
      */
-    public FirebaseListAdapter(Activity activity,
+    public FirebaseListAdapter(Context context,
                                SnapshotParser<T> parser,
                                @LayoutRes int modelLayout,
                                Query query) {
-        this(activity, new FirebaseArray<>(query, parser), modelLayout);
+        this(context, new FirebaseArray<>(query, parser), modelLayout);
     }
 
     /**
-     * @see #FirebaseListAdapter(Activity, SnapshotParser, int, Query)
+     * @see #FirebaseListAdapter(Context, SnapshotParser, int, Query)
      */
-    public FirebaseListAdapter(Activity activity,
+    public FirebaseListAdapter(Context context,
                                Class<T> modelClass,
                                @LayoutRes int modelLayout,
                                Query query) {
-        this(activity, new ClassSnapshotParser<>(modelClass), modelLayout, query);
+        this(context, new ClassSnapshotParser<>(modelClass), modelLayout, query);
     }
 
     @Override
@@ -126,7 +128,7 @@ public long getItemId(int i) {
     @Override
     public View getView(int position, View view, ViewGroup viewGroup) {
         if (view == null) {
-            view = mActivity.getLayoutInflater().inflate(mLayout, viewGroup, false);
+            view = LayoutInflater.from(mContext).inflate(mLayout, viewGroup, false);
         }
 
         T model = getItem(position);